Русско-английский научно-технический словарь
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Ultrasonic waves with frequencies of a billion hertzand up(orover, ormore) are capable of travelling several centimetres through a solid medium.
Русско-английский научно-технический словарь
Ultrasonic waves with frequencies of a billion hertzand up(orover, ormore) are capable of travelling several centimetres through a solid medium.